A human male decides to adopt a surgical method for contraception. Identify the point in the diagram where a cut would be made and tied.

The correct option is Point Q.

To understand why this is the correct location for a male surgical contraception method, let us identify the labeled parts in the provided anatomical diagram of the human male reproductive system:
• S represents the urinary bladder, which stores urine.
• T represents a secretory gland (specifically the prostate gland or seminal vesicle), which contributes fluids to the semen.
• Q represents the vas deferens (also known as the sperm duct), a long muscular tube that transports mature sperm from the testes/epididymis towards the urethra.
• P represents the urethra, the common channel for both urine and semen to exit the body.
• R points to the testis (and surrounding epididymis), where sperm production and initial maturation take place.

Step-by-Step Explanation of the Surgical Method (Vasectomy):
1. Mechanism of Contraception: In males, a permanent surgical contraceptive method is known as a vasectomy. The primary objective of this procedure is to block the pathway of sperm, preventing them from mixing with semen and exiting the body during ejaculation.
2. Locating the Target: Since sperm are produced in the testes (labeled R) and must travel through the vas deferens (labeled Q) to reach the urethra (labeled P), blocking the vas deferens effectively prevents fertilization.
3. The Procedure: During a vasectomy, a small incision is made in the scrotum, and the vas deferens (Point Q) on both sides is cut, and the cut ends are tied or sealed. This blocks sperm transport permanently, while semen can still be ejaculated but without containing any sperm.
Therefore, the correct surgical site for contraception is at Point Q.